lua computer 3x3 door

-- pastebin get rU7eAYTj ftw
-- -------------------------------------------
-- 3x3 door -Sinkir-
-- Version 1
-- setup :
-- Computer with 3 repater on 3 side
-- 1 dust under the computer whith block and repeater
-- 1 restone signal in front (input).
-- 3 output rednet cable (3 colors)
-- view from top
-- r r r
-- r R r
-- rRCRr
--   I
-- r = rednet cable
-- R = repeater
-- C = Computer
-- I = Input (redstone)
-- -------------------------------------------


function fileGet(path)
        if(fs.exists(path))then
                tabFile = fs.open(path, "r")
                text = tabFile.readAll()
                tabFile.close()
                return text
        else
                print("fileGet() File not found.")
                print(path)
                return false
        end
end

function fileSet(path, text)
        if(fs.isReadOnly(path))then
                print("fileSet() File is read only.")
                print(path)
                return false
        else
                tabFile = fs.open(path, "w")
                tabFile.write(text)
                tabFile.close()
                return true
        end
end

function savedata()
    fileSet("data", a)
end

function input(side)
    redstone.setOutput(side, true)
    sleep(0.1)
    redstone.setOutput(side, false)

end


if(fs.exists("data")==true)then
    --Shaundi()
else
    fileSet("data", "0")
end

a = fileGet("data")

flag = false
while(2)do
    if(redstone.getInput("front") == true and flag == false)then
        --
        if(a == "0")then
            --opening
            input("right")
            sleep(0.1)
            input("bottom")
            sleep(0.1)
            input("left")
            sleep(0.1)
            input("back")
            sleep(0.1)
            input("left")
            sleep(0.1)
            input("right")

            a = "1"
        else
            --closing
            input("right")
            input("back")
            input("bottom")
            input("right")


            a = "0"
        end
        savedata()


        flag = true
    end
    if(redstone.getInput("front") == false)then
        flag = false
    end
    sleep(0.2)
end